package art.yulang.framework.utils;

public class StringUtil {
    /**
     * 首字母小写
     * @param str
     * @return
     */
    public static String lowerFirst(String str){
        char[] chars = str.toCharArray();
        if('A' <= chars[0] && chars[0]<= 'Z'){
            chars[0] += 32;
        }
        return String.valueOf(chars);
    }
}
